In this final chapter of the Book of Mormon, Moroni exhorts us (encourages strongly) to ponder and pray about the things that we’ve read. He promises that “if ye shall ask with a sincere heart, with real intent, having faith in Christ, he will manifest the truth of it unto you, by the power of the Holy Ghost (Moroni 10:4).”
Moroni continues to write about the power and gifts of God. He tells us that different gifts are given to different people, but every good gift comes from Christ. He exhorts us to come unto Christ and lay hold upon every good gift. As Moroni summarizes the main message of the book, he teaches that if we live righteously and love God and serve Him, we can be perfected through the grace of God and the Atonement of Jesus Christ.
The Book of Mormon itself is a wonderful gift brought forth through the gift and power of God. Through the gift of the Holy Ghost we can know that this book is true.